LDS 925 | CAS 94507-05-8

LDS 925 is a fluorescent labeling dye used as a nucleic-acid stain for visualization and quantification of DNA in gel-based and fluorescence-based workflows. In practice, it is selected for its strong affinity for nucleic acids and its compatibility with common fluorescence imaging systems used in molecular biology and analytical laboratories. Researchers typically deploy LDS 925 when they want a convenient fluorescent readout for DNA-containing samples without relying on traditional UV-based staining.

1. DNA Gel Electrophoresis Staining

LDS 925 is routinely used to stain DNA after agarose or polyacrylamide gel electrophoresis, enabling fluorescence imaging of DNA bands with reduced reliance on UV visualization. Molecular biology teams and core facilities use this workflow for routine fragment sizing, plasmid screening, and assessment of PCR or restriction digest products, where a clear fluorescent band pattern supports downstream documentation and data archiving. The dye's nucleic-acid affinity makes it a practical choice for gel imaging pipelines that integrate with standard blue/green excitation and fluorescence capture systems.

2. Fluorescence-Based DNA Quantification

LDS 925 supports fluorescence readouts for DNA quantification in microplate and benchtop assay formats used during cloning, library preparation, and workflow QC. Researchers use the dye to monitor DNA concentration trends across purification steps such as PCR clean-up, column-based recovery, or bead-based size selection, where fluorescence intensity provides a convenient measurement that can be recorded alongside other process controls. This application is especially common in laboratories that standardize DNA quantification using fluorescence imaging or plate readers rather than relying solely on absorbance-based methods.

3. Nucleic Acid Workflow QC

LDS 925 is applied as a diagnostic staining reagent within nucleic-acid workflows to verify sample integrity and enrichment, including checks for DNA presence in workflow fractions and confirmation of successful purification. Genomics and molecular diagnostics research groups often incorporate the dye into routine QC steps for plasmid prep fractions, PCR product pools, or library intermediates, using fluorescence visualization to flag unexpected banding patterns or low-yield samples before committing to downstream steps. The dye's straightforward use in fluorescence imaging workflows makes it a practical tool for day-to-day molecular biology operations.

4. Fluorescence Imaging Documentation

LDS 925 is frequently used to generate high-contrast fluorescence images for reporting and recordkeeping in molecular biology laboratories and teaching or training environments. Researchers use stained gels or DNA-containing samples as visual evidence for experimental outcomes, including comparisons across conditions, batches, or time points. Compatibility with routine fluorescence imaging setups supports consistent documentation of DNA bands and enables straightforward transfer of images into lab notebooks, electronic lab systems, and supplementary figure preparation workflows.